45/70 barrel length velocity loss ?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by deathwobble, Nov 4, 2012.

  1. deathwobble

    deathwobble Well-Known Member

    Jul 16, 2012
    Ok recently got a HR 45/70 ultra 24"stainless rifle. Although I love the feel of the rifle very basic and simple it kicks like a frieght train. So i have decided to have a muzzle break put on this rifle... I was wondering how much of a velocity loss I can expect If I have my gunsmith shorten my barrel to 18" over all with the break so looking at about 7" of barrel lopped off. Im not really concerned about affecting the trajectory of the rifle as much as the 100-200 yard stopping power.

    currently loading
    powder: H335
    Charge: 68gr
    Bullet: 300gr JHP
    Primer: fed215 LRM
    Velocity: 2505fps